new utilities.

the .C files compile but are renamed to avoid building automatically.

src/cmd/time.c

@@ -0,0 +1,101 @@
+#include <u.h>
+#include <libc.h>
+
+char	output[4096];
+void	add(char*, ...);
+void	error(char*);
+void	notifyf(void*, char*);
+
+void
+main(int argc, char *argv[])
+{
+	int i;
+	Waitmsg *w;
+	long l;
+	char *p;
+	char err[ERRMAX];
+
+	if(argc <= 1){
+		fprint(2, "usage: time command\n");
+		exits("usage");
+	}
+
+	switch(fork()){
+	case -1:
+		error("fork");
+	case 0:
+		exec(argv[1], &argv[1]);
+		if(argv[1][0] != '/' && strncmp(argv[1], "./", 2) &&
+		   strncmp(argv[1], "../", 3)){
+			sprint(output, "/bin/%s", argv[1]);
+			exec(output, &argv[1]);
+		}
+		error(argv[1]);
+	}
+
+	notify(notifyf);
+
+    loop:
+	w = wait();
+	if(w == nil){
+		errstr(err, sizeof err);
+		if(strcmp(err, "interrupted") == 0)
+			goto loop;
+		error("wait");
+	}
+	l = w->time[0];
+	add("%ld.%.2ldu", l/1000, (l%1000)/10);
+	l = w->time[1];
+	add("%ld.%.2lds", l/1000, (l%1000)/10);
+	l = w->time[2];
+	add("%ld.%.2ldr", l/1000, (l%1000)/10);
+	add("\t");
+	for(i=1; i<argc; i++){
+		add("%s", argv[i], 0);
+		if(i>4){
+			add("...");
+			break;
+		}
+	}
+	if(w->msg[0]){
+		p = utfrune(w->msg, ':');
+		if(p && p[1])
+			p++;
+		else
+			p = w->msg;
+		add(" # status=%s", p);
+	}
+	fprint(2, "%s\n", output);
+	exits(w->msg);
+}
+
+void
+add(char *a, ...)
+{
+	static int beenhere=0;
+	va_list arg;
+
+	if(beenhere)
+		strcat(output, " ");
+	va_start(arg, a);
+	vseprint(output+strlen(output), output+sizeof(output), a, arg);
+	va_end(arg);
+	beenhere++;
+}
+
+void
+error(char *s)
+{
+
+	fprint(2, "time: %s: %r\n", s);
+	exits(s);
+}
+
+void
+notifyf(void *a, char *s)
+{
+	USED(a);
+	if(strcmp(s, "interrupt") == 0)
+		noted(NCONT);
+	noted(NDFLT);
+}